Adjustable self-cleaning grate



(No Mod-e1.)

ADJUSTABLE SELF CLEANING GRATE. No. 540,816. Patented June 11, 1895.

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l UNITED STATES PATENT QEEICE.

MORRIS D. MACKNET, OF NEWARK, NEW JERSEY.

ADJUSTABLE SELF-CLEANING GRATE.

SPECIFICATION forming part of Letters Patent No. 540,816, dated June1.1, 1895.

Application filed March 1, 1 895.

To all whom, may concern,.-

Bo it known that I, MORRIS D. MACKNET, a citizen of the United States,residing in the city of Newark, county of Essex, and State of NewJersey, have invented certain new and useful Improvements in AdjustableSelf- Cleaning Grates; and I do hereby declare-the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference markedthereon, which forma part of this specification.

The object of my invention is to provide an adjustable self-cleaninggrate of simple and durable construction, easily handled and reliable inoperation.

The invention consists in the improved grate, its rocking mechanism, andin the combination and arrangements of the Various parts thereof,substantially as will be hereinafter more fully described and claimed.

In the drawings, Figure l is a side eleva tion of my improved grate,certain portions beingbroken away and others shown in seotion; Fig. 2, afront elevation of a portion of Fig. l; Fig. 3, a View similar to Fig.l, illustrating the various parts in position While the grate is beingrocked; and Figs. 4, 5, and G are detail views of one of the clips andof a certain rocking lever, respectively.

In said' drawings a .represents the front, b the sides of the grate, andb the forward cross head bar secured to the sides ZJ in any desiredmanner. Said cross head bar b is provided with a series of verticallyarranged projections l)2 adapted Vto form passages for the clinker andashes.

In the side sections b are arranged a series of openings c adapted toform the bearings for the rocking bars d, which latter are provided witha series of vertically arranged grooves d', adapted to receive thecorrespondingly shaped sides of the slots e in the clips c.l Said clipshave a segmental shaped upper portion provided on each side witha seriesof y projections e? as clearly shown, and are so arranged on the rockingbar d, that a sufficient space is leftJ between them, to allow theelinkers and ashes to drop through, when said clips Serial No. 540,194.(No model.)

and their projections cut into the under side of the body of the fuel.

Depending from the under side of the grate bar d and arrangedalternately are a series of shorter and longer crank arms fand f3,provided at or near their lower ends with suitable crank pins orprojectionsf adapted to engage correspondingly shaped openings in thehorizontally arranged connecting bars g and g. The arm g is provided ator near its forward end with a downwardly extending projection h towhich is pivotally secured oneend of the lever t', while to the forwardprojection h on bar g' is pivotally secured one end of the lever 'i'.The forward ends of said levers t and t" project through vertical slol'sZand Z in the front a respectively, and are pivotally secured to thelevers k and 7c fulcrumed near their upper ends on the pin m' arrangedin bracket n, as clearly shown. The face ends of said fulcrumed levers7.a and la are adapted to be engaged bythe socket of the handle o, aswill be manifest.

In operation the levers 7c and k are oscillated by means of the handleo, which movement is transferred through levers "i and t" to theconnecting bars g and g respectively, which in turn oscillate therocking bars and their respective clips. This movement of the clipscauses them to grind or cut against the under surface of the fuel,without any general or partial upheaval of the same, and thereby anyclinker which may gather there is broken away. The projections e? on thesides of the clips grind up said clinker and allow it to pass with theashes from the burning mass into the space beneath.

By having the crank arms f3 andf of different length, a somewhatdifferential move-y ment of the different sets of clips is produced,whereby the openings at every other set of the clips are enlarged whilethe lever 0 is operated in one direction, and are reduced while beingoperated in the opposite direction. This feature is found to be of greatadvantage in the above described operation.

Having thus described my invention,- what I claim as new, and desire tosecure by Letters Patent, is- I 1. The combination with series ofrocking grate bars, the ba'rs of 'the respective series TOO and longercrank arms, a lever pivoted to each of said connecting arms, and afulcrumcd p5 lever pivoted to the free end. of each of the levers, allsaid parts, substantially as and for the purposes described.

In testimony that I claim the foregoing I have hereunto set my band this27th day of zo February, 1895.

MORRIS D. MAoKNE'r.

Witnesses:

WM. D. BELL, ALFRED GARTNER.

